Abstract
Phytotoxins are secondary metabolites that contribute to the development and/or severity of diseases caused by various plant pathogenic microorganisms. The coronafacoyl phytotoxins are an important family of plant toxins that are known or suspected to be produced by several phylogenetically distinct plant pathogenic bacteria, including the gammaproteobacterium Pseudomonas syringae and the actinobacterium Streptomyces scabies. At least seven different family members have been identified, of which coronatine was the first to be described and is the best-characterized. Though nonessential for disease development, coronafacoyl phytotoxins appear to enhance the severity of disease symptoms induced by pathogenic microbes during host infection. In addition, the identification of coronafacoyl phytotoxin biosynthetic genes in organisms not known to be plant pathogens suggests that these metabolites may have additional roles other than as virulence factors. This review focuses on our current understanding of the structures, biosynthesis, regulation, biological activities and evolution of coronafacoyl phytotoxins as well as the different methods that are used to detect these metabolites and the organisms that produce them.
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D.R.D. Bignell acknowledges support from the Natural Science and Engineering Research Council of Canada Discovery Grants program (Grant no. 386696-2010), the Canada Foundation for Innovation Leaders Opportunity Fund (Project no. 30482) and the Newfoundland and Labrador Research and Development Corporation Leverage R&D program (Project No. 5404.1218.103).
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Bignell, D.R.D., Cheng, Z. & Bown, L. The coronafacoyl phytotoxins: structure, biosynthesis, regulation and biological activities. Antonie van Leeuwenhoek 111, 649–666 (2018). https://doi.org/10.1007/s10482-017-1009-1
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DOI: https://doi.org/10.1007/s10482-017-1009-1